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AMOS STEVENS, OF FITCHBURG, MSSAGHUSETTS, ASSIGNOR T0 HIMSELF AND HENRY G. MAHURIN.

Letters Patent No. 97,457, dated Nocemlie-r 30, 1869.

The Schedule referred to in these Letters Patent and :making part of the same.

To all whom it may concern:

Be it known that I, AMos Srnvess, of Fitchburg, in the county of Worcester, 'and State of- Massachusetts, have invented certain Improvements in Apparatuslfor Generating and Carburetting Illuminating- Gas; and I do hereby declare that the following, taken in connection with vthe drawings which accompany and form part of' this specication, is a description of my invention suiiicient to enable those skilled in the art to practise it.

Figure 1 represents twoihydrogen-gas generators, A and B, placed near each other, and constructed, in the main, exactly alike; Land, being also the same in their operation, a description of one will suiiice for both. v

In this gure- C is the outside cylinder, connected with the bott'om D, which is Set up Within the cylinder, say, about t'onr inches from the bottom line.

E is another smaller cylinder, connected also with' the bottom D.

These two cylinders G and E (one being Within the other) have an annular space, of about two inches, between them.

' This space is filled vwith water up to the dotted line F, or thereabout.

Standing in this water-space or chamber is another cylinder, G, attached to the raised top H, this to'p,

` with the cylinder G, being free to rise or fall, according to ,theamount of v pressure of the gas.

I is a tank to contain a solution of acid and water. Y is a vessel, with perforated bottom, into which 4is placed zinc or scrap-iron and this vessel is suspended by straps from the top H. 1

The top H has a screw-ca M, through which the zinc is passed to the vessel, as is also the solutionI to the tank I.

The screw-cap M is tted 'with arod, N, which passes up through the bar O.

This bar is fastened at each end hy means of a screw and nut.

J is a draw-ofi` pipe, leading from the tank I.

Into the top of this pipe is: inserted a glass tube, Z, to indicate the height of the solution in the tank.

A' draw-'oli' for water, and a draw-olf for any substance that may collect in the drip-pan V, may be applied at any convenient point.

P R are gas-pipes, leading` from the generators to the inain pipe S.

The upper end of the pipes P R are fitted with gascocks--one in each.

These `gas-cocks are connected by a shaft lbetween them, onwhich is a wheel with cords and weight.

To the ends o f the gas cocks are attached the shafts T T.

Figure 2 represents .the gasolneter and carburetter.

1) 1is .the ont-side cylinder, with a bottoni, It', setnp yin it, say, four inches from its base-line.

In the centre ot' this cylinder` is placed a double cone-shapedftank, one end of which passes down through the bottom B.

This tank is held in'positicn by staysii'om the sides down to the bottom.

The space around the tank is filled with water np to the dotted line. l

In this water space stands another cylinder, l, which is attached to the top M', and is free to rise or fall, according to Athe pressure of gas.

It is a bar across the top of the gasometer, fastened at each end with screw and nut. This. bar prevents the float ofthe gasometer from being raised ont of the water.

The tank or carbnretter containsV a portion ot' light petroleum-oil up to the dotted line C.

F. is a draw-off for the oil, in the top 'ci' which may be inserted a'tube, rising perpendicular, and havingr a c'up or mouth, through which the oil is passed to the tank.

H'4 isa draw-oh" from the drip-pan O'.

The pipe S from the generators enters the carburetter at the bottom, extends to the top, and down,

under the oil, to the bottom, where the gas is forced out, and rises through theoil-space above, andis taken out at the top through the pipe L', which lies coiled once around the top of the carburetter, and is perforated with numerous small holes, through which the gas is forced, and rises up, through the water that surrounds the carburetter, to the space above, prepared for use.

V .is a pipe, that conducts the gas to the bnrnels. W'hen the generators,iig. l, are charged, the floats at once rise, by pressure of gas, as does also the float ofthe gasometer, iig. 2, to the position shown in dotted lines, at which point the zinc is out 0i the solution, and the action ceases. All will remain in this position until a vent is produced bylighting the bnrneis, when the oat of that generator which, for the time being, is open to the main pipe, begins to fall, which irnrnerses the zinc again into the solution, and more gas is formed.

XVhenever the burners are closed, the llo-at of the generator, which is then in action, at once rises, taking the zinc out of` the solution, and all action ceases.

When a generator becomes exhausted, the tioat sinks down, and the rod N falls below thearm on the shall; T, which allows said shaft? to make a quarter I the other automatically and instantaneously into am revolution, thus lclosing the gas-cook of the exhausted generator, and instantly opening the gas-cook from the other, which at oneercomes into action. rlihe exf hausted generator can then be recharged, when the float at once rises, and remains to be acted npon by the exhaustion of the other. Thus, in t-nrn. the exhaustion of one generator brings the other automatically and instantaneously into action.

I. claim-- i 1. The combination of two hydrogen-gas generators, in such a manner that the exhaustion of -one brings tion, by means of a partially-revolving gas-oook, with shaft and arms, operated by wheel and weight, or equivalents, substantially as herein set forth.

2. The double gone-shaped tank, placed in the centre of the gasorneter, with the pipe L coiled` around che top, by which the gas is passed up through the Water, as herein set forth,

AMOS STEVENS.

Witnesses:

Ganas H. WHITNEY, NATHL. WOOD. 

